Service Manual 73
Troubleshooting Guide
Error
Title
Cause of error
Check point & Normal condition
code
05 / 53
Communication
(Indoor
➔
Outdoor)
• Communication poorly
• Power input AC 230V.(Outdoor, Indoor)
• The connector for transmission is disconnected.
• The connecting wires are misconnected.
• The GND 1,2 is not connected at main GND.
• The communication line is shorted at GND.
• Transmission circuit of outdoor PCB is abnormal.
• Transmission circuit of indoor PCB is abnormal.
❑
Check Point
1. Check the input power AC 230V.(Outdoor, Indoor)
2. Check the communication wires are correctly connected.
➔
Adjust the connection of wire
➔
Confirm the wire of "Live", "Neutral".
3. Check the resistance between communication line and GND.(Normal : Over 2M
Ω
)
4. Check the connector for communication is correctly connected.
5. Check the connection of GND1, GND2, and main GND.
6. If one indoor unit is operated normally, outdoor PCB is no problem.
➔
Check the another indoor unit.
* CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.
Содержание A2UC243FA0 (LMU240CE)
Страница 56: ...56 Multi type Air Conditioner Schematic Diagram 2 Outdoor Unit ...
Страница 57: ...Service Manual 57 Schematic Diagram ...
Страница 60: ...60 Multi type Air Conditioner Schematic Diagram 2 Art Cool Type TOP VIEW BOTTOM VIEW ...
Страница 62: ...62 Multi type Air Conditioner Schematic Diagram 3 Outdoor Unit 1 Component side ...
Страница 63: ...Service Manual 63 Schematic Diagram 2 Solder side ...
Страница 86: ...P No 3828A20474C May 2006 Printed in Korea ...